CN219978749U - Gas flow regulating system and oxygenation regulating cabinet - Google Patents

Abstract

The utility model provides a gas flow adjustment system and an oxygen adjustment cabinet, relating to the field of oxygen adjustment. The gas flow regulating system includes a gas transmission channel and a pressure regulating valve, a gas supply pressure gauge, a throttling member, a pressure stabilizing pressure gauge and a pressure stabilizing valve arranged sequentially in the gas transporting channel along the gas transporting direction. The pressure regulating valve is used for regulating Gas pressure and output gas with stable pressure. The pressure stabilizing valve is used to stabilize the gas pressure between the throttle and the pressure stabilizing valve at the set value. When using this gas flow adjustment system, adjust the pressure regulating valve so that the pressure regulating valve outputs gas with a preset reference pressure, and then adjust or select the throttling path of the throttling member according to the dissolved oxygen value to make the dissolved oxygen value reach the target value. ; When the load of the unit changes or the feed water flow changes, just adjusting the air supply pressure of the pressure regulating valve can adjust the mass flow of the output gas of the entire gas flow adjustment system. There are few adjustment variables, which is helpful to improve the adjustment accuracy of the oxygen flow, so Oxygen addition accuracy is high.

Description

A gas flow adjustment system and oxygen adding adjustment cabinet

Technical field

The utility model relates to the technical field of oxygen adjustment, specifically, to a gas flow adjustment system and an oxygen adjustment cabinet.

Background technique

Boiler feed water oxygenation treatment is the optimal feed water treatment condition for super (super) critical units, which can solve the flow-accelerated corrosion of feed water and high-pressure drainage systems and a series of problems caused by it.

Traditional gaseous oxygenation devices use electromagnetic regulating valves, which are greatly affected by front and rear pressure fluctuations. When the unit load changes, the pressure at the oxygen adding point will fluctuate. When the electromagnetic regulating valve adjusts the gas flow, the opening of the electromagnetic regulating valve will At the same time as the temperature changes, the gas pressure at the outlet will also be disturbed, so the oxygen adjustment is unstable and the control accuracy is low, which can easily lead to a decrease in the anti-corrosion effect of the oxygen treatment, and may cause concentrated peeling of the oxide scale in the steam system; when used to control small When controlling flow gas such as oxygen addition, its control accuracy needs to be improved.

Utility model content

The first purpose of the present utility model is to provide a gas flow adjustment system to solve the technical problem in the prior art that the oxygen adjustment accuracy of the gaseous oxygenation device is relatively poor.

The gas flow regulating system provided by the utility model includes a gas transmission channel and a pressure regulating valve, a gas supply pressure gauge, a throttling member, a pressure stabilizing pressure gauge and a pressure stabilizing valve that are sequentially arranged in the gas transmission channel along the gas transport direction. The pressure regulating valve is used to regulate gas pressure and output gas with stable pressure. The pressure regulating valve is used to stabilize the gas pressure between the throttling member and the pressure regulating valve at a set value.

Further, the gas flow adjustment system also includes a controller, the pressure regulating valve, the gas supply pressure gauge, and the stabilizing pressure gauge are all connected to the controller, and the controller is used to adjust the flow rate according to the unit load or The feed water flow rate and dissolved oxygen value dynamically adjust the air supply pressure of the pressure regulating valve.

Furthermore, a switch valve and a gas source pressure gauge are provided between the air inlet of the gas transmission channel and the pressure regulating valve, and the gas source pressure gauge is connected to the controller.

Furthermore, the gas transmission channel is also provided with a flow meter, which is located between the throttle member and the pressure stabilizing valve and is used to indicate the gas flow rate downstream of the throttle member.

Further, the throttling member is a micro-regulating valve or a capillary tube.

Further, the pressure regulating valve includes a housing and a pressure reducing valve body, a pressure reducing valve cap, an actuator and an adjusting rod arranged in the housing. The pressure reducing valve cap is fixedly arranged on the pressure reducing valve body. , the actuator adjusts the air supply pressure of the pressure reducing valve body by driving the adjusting rod.

Further, the gas flow adjustment system further includes a mounting bracket, the mounting bracket is fixedly installed on the pressure reducing valve cap, and the actuator is fixedly installed on the mounting bracket.

Further, the actuator is an electric actuator or a pneumatic actuator.

Further, the pressure reducing valve body is of piston type or diaphragm type.

Further, a control cable is also provided in the housing, and the housing is provided with an aviation connector. One end of the control cable is connected to the aviation connector, and the other end is connected to the actuator.

Further, the housing includes a base and an upper shell, the pressure reducing valve body is fixedly mounted on the base, and the upper shell covers the base.

The gas flow adjustment system provided by the utility model can produce the following beneficial effects:

When using the gas flow adjustment system provided by the utility model, the pressure regulating valve is adjusted so that the pressure regulating valve outputs gas with a preset reference pressure, and then the throttle flow is adjusted according to the dissolved oxygen value at the economizer inlet or the throttling member is selected. diameter to make the dissolved oxygen value reach the target value; later, when the unit load changes or the feed water flow changes, because according to Bernoulli's law, when the fluid flows at a constant height, the flow rate is large and the pressure is small, that is, there is a negative relationship between flow rate and pressure. Related, and there is a direct proportional relationship between the flow rate and the mass flow rate. Therefore, the flow rate change can be obtained through the air supply pressure and the stabilizing pressure, and then the mass flow rate change can be obtained. Therefore, only the air supply pressure of the pressure regulating valve can be adjusted. Adjust the mass flow rate of the output gas of the entire gas flow regulating system. That is, using the gas flow adjustment system provided by the present invention, when adding oxygen, only one variable is required to adjust the gas supply pressure, and there are few adjustment variables, which is beneficial to improving the accuracy of adjusting the oxygen flow rate, so the accuracy of oxygen addition is high.

In addition, the gas flow adjustment system provided by the utility model uses a pressure regulating valve. When compressed air is used as the gas source, it can avoid the moisture contained in the decompressed compressed air from invalidating the detection feedback loop of the electromagnetic regulating valve and causing control chaos. The phenomenon.

The second purpose of the present utility model is to provide an oxygenation adjustment cabinet to solve the technical problem of poor oxygenation adjustment accuracy of the gaseous oxygenation device existing in the prior art.

The oxygen adding adjustment cabinet provided by the utility model is characterized in that it includes the above-mentioned gas flow adjustment system, the air inlet end of the oxygen adding adjustment cabinet is connected to the oxygen source, and the air outlet end is connected to the oxygen adding point. This oxygenation adjustment cabinet has all the advantages of the above-mentioned gas flow adjustment system, and the accuracy of oxygenation adjustment is high, which will not be described again here.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description These are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without exerting creative efforts.

Figure 1 is a schematic diagram of an oxygen adding adjustment device in the prior art;

Figure 2 is a schematic diagram of the gas flow adjustment system provided by the utility model;

Figure 3 is a schematic cross-sectional structural view of the pressure regulating valve of the gas flow regulating system provided by the present invention.

Explanation of reference symbols:

100＇-Air source pressure gauge; 200＇-First-level pressure reducing valve; 300＇-First-level pressure reducing pressure gauge; 400＇-Second-level pressure reducing valve; 500＇-Second-level pressure reducing pressure gauge; 600＇-Electromagnetic Regulating valve; 700＇-pressure stabilizing gauge; 800＇-pressure stabilizing valve;

100-switch valve; 200-air source pressure gauge; 300-pressure regulating valve; 400-air supply pressure gauge; 500-throttle piece; 600-stabilizing pressure gauge; 700-flow meter; 800-pressure stabilizing valve; 900 -control box;

310-shell; 311-base; 312-upper shell; 320-pressure reducing valve body; 330-pressure reducing valve cap; 340-mounting bracket; 350-actuator; 360-adjusting rod; 371-control cable; 372- Aviation connector; 381-air inlet connector; 382-air outlet connector; 391-spare air inlet plug; 392-spare outlet plug.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

As shown in Figure 1, in a traditional gaseous oxygenation device, the gas is decompressed successively through the first-level pressure reducing valve 200' and the second-level pressure reducing valve 400', then reaches the electromagnetic regulating valve 600', and finally is output after passing through the pressure stabilizing valve 800'. , the gas transmission channel is also equipped with a gas source pressure gauge 100', a first-level pressure reduction pressure gauge 300', a second-level pressure reduction pressure gauge 500' and a stabilizing pressure gauge 700', which are used to measure the gas source pressure, first-level pressure gauge 700' respectively. The gas pressure after pressure reduction by the pressure reducing valve 200', the gas pressure after pressure reduction by the secondary pressure reducing valve 400' and the stabilized pressure. Among them, the electromagnetic regulating valve 600' is used to adjust the oxygen flow rate. However, when its opening changes, the air supply pressure also changes. There are many control variables and it is difficult to improve the control accuracy. Moreover, the electromagnetic regulating valve 600' is not suitable for compression. When air is used as the air source, because the compressed air contains moisture after decompression, the detection feedback loop of the solenoid regulating valve 600' will fail, resulting in chaotic regulation.

In order to solve the above problems, this embodiment provides a gas flow adjustment system. As shown in Figure 2, the gas flow adjustment system includes a gas transmission channel and a pressure regulating valve 300 arranged sequentially in the gas transmission channel along the gas transportation direction. Gas pressure gauge 400, throttling member 500, pressure regulating pressure gauge 600 and pressure regulating valve 800. The pressure regulating valve 300 is used to regulate the gas pressure and output gas with stable pressure. The pressure regulating valve 800 is used to connect the throttling member 500 and The gas pressure between the pressure stabilizing valves 800 is stabilized at the set value.

When using the gas flow adjustment system provided by this embodiment, the pressure regulating valve 300 is adjusted so that the pressure regulating valve 300 outputs gas with a preset reference pressure, and then the throttling member 500 is adjusted or selected according to the dissolved oxygen value at the economizer inlet. The throttling path allows the dissolved oxygen value to reach the target value; in the later period, when the unit load changes or the feed water flow rate changes, because according to Bernoulli's law, when the fluid flows at a constant height, the flow rate is large and the pressure is small, that is, the relationship between flow rate and pressure is There is a negative correlation between the flow rate and the mass flow rate, and there is a positive proportional relationship between the flow rate and the mass flow rate. Therefore, the flow rate change can be obtained through the air supply pressure and the stabilizing pressure, and then the mass flow rate change can be obtained. Therefore, only the supply of the pressure regulating valve 300 is adjusted. The gas pressure can adjust the mass flow rate of the output gas of the entire gas flow adjustment system. That is, using the gas flow adjustment system provided by this embodiment, when adding oxygen, only one variable is required to adjust the gas supply pressure. The adjustment variables are few, which is beneficial to improving the accuracy of adjusting the oxygen flow rate, so the accuracy of oxygen addition is high.

In addition, the gas flow adjustment system provided in this embodiment uses the pressure regulating valve 300. When compressed air is used as the gas source, it can avoid the moisture contained in the decompressed compressed air from invalidating the detection feedback loop of the electromagnetic regulating valve and causing control. Chaos phenomenon.

Specifically, in this embodiment, the gas flow adjustment system also includes a controller. The pressure regulating valve 300, the gas supply pressure gauge 400, and the stabilizing pressure gauge 600 are all connected to the controller. The controller is used to adjust the gas flow rate according to the unit load or feed water flow and dissolution. The oxygen value dynamically adjusts the air supply pressure of the pressure regulating valve 300. The controller obtains the air supply pressure from the air supply pressure gauge 400 in real time, and obtains the steady pressure from the pressure stabilizing pressure gauge 600. According to the unit load or feed water flow, and the dissolved oxygen value, the controller dynamically adjusts the air supply pressure in real time, and then dynamically adjusts the heating in real time. Oxygen flow rate to ensure that the dissolved oxygen value in the feed water remains stable; and compared with manual adjustment, the controller's intelligent adjustment error is smaller, the accuracy is higher, and the adjustment is more stable.

More specifically, in this embodiment, as shown in FIG. 2 , the controller is installed in the control box 900 , and the control box 900 forms a protective effect on the controller.

Specifically, in this embodiment, as shown in Figure 2, a switch valve 100 and a gas source pressure gauge 200 are also provided between the air inlet of the gas transmission channel and the pressure regulating valve 300. The gas source pressure gauge 200 and the controller connect. With this arrangement, the gas flow adjustment system can control the on and off of the gas flow by itself, and can obtain the pressure of the gas source more accurately, so that the pressure regulating valve 300 can adjust the pressure. Of course, in other embodiments of the present application, the switching valve 100 and the gas source pressure gauge 200 may not be provided upstream of the pressure regulating valve 300. Whether the gas flows in the gas flow regulating system may depend on the ventilation of the gas supply device connected to it. , cut off, and the air source pressure can also be obtained from the air supply device.

More specifically, in this embodiment, the switch valve 100 is a needle valve. Of course, in other embodiments of the present application, it is not limited to this.

Specifically, in this embodiment, the gas transmission channel is also provided with a flow meter 700. The flow meter 700 is located between the throttling member 500 and the pressure stabilizing valve 800, and is used to indicate the gas flow downstream of the throttling member 500.

Preferably, the flow meter 700 is a mass flow meter. The mass flow meter can measure the mass flow of the supplied gas, that is, it can feed back the adjustment results and guide the adjustment to optimize the adjustment results. Furthermore, the mass flow meter can be connected to the controller, so that the controller can obtain the adjustment results in time and perform adjustment optimization in time. Of course, the flow meter 700 can also be a volume flow meter. The volume flow meter can reflect the adjustment trend, that is, it can qualitatively reflect the adjustment results, so it can also play a certain guiding role.

Specifically, in this embodiment, the throttling member 500 is a micro-regulating valve with an adjustable throttling diameter and a relatively large adjustment range, so the applicable range is relatively wide and applicable to many working conditions; moreover, when blockage occurs, it can Open the micro-regulating valve wide to flush out the blockage and facilitate inspection and maintenance. However, in other embodiments of the present application, the throttling member 500 can also be a capillary tube with a constant throttling path, which is relatively low-cost.

Specifically, in this embodiment, as shown in Figure 3, the pressure regulating valve 300 includes a housing 310 and a pressure reducing valve body 320, a pressure reducing valve cap 330, an actuator 350 and an adjusting rod 360 arranged in the housing 310. The pressure reducing valve cap 330 is fixedly arranged on the pressure reducing valve body 320 , and the actuator 350 adjusts the air supply pressure of the pressure reducing valve body 320 by driving the adjusting rod 360 .

Specifically, in this embodiment, as shown in FIG. 3 , the gas flow adjustment system also includes a mounting bracket 340 , the mounting bracket 340 is fixedly mounted on the pressure reducing valve cap 330 , and the actuator 350 is fixedly mounted on the mounting bracket 340 . With this arrangement, the mounting bracket 340 serves as a carrier for the actuator 350 and provides stable support for the actuator 350 so that the actuator 350 can operate stably and accurately to ensure adjustment accuracy.

More specifically, in this embodiment, the mounting bracket 340 is installed on the pressure reducing valve cap 330 through fixing screws.

Specifically, in this embodiment, the actuator 350 is an electric actuator, for example, it can be a servo motor. The control accuracy of the servo motor is high, which is beneficial to ensuring the accuracy of oxygen flow rate adjustment.

It should be noted here that in other embodiments of the present application, the actuator 350 may also be a pneumatic actuator, for example, it may be a cylinder, etc.

Specifically, in this embodiment, the pressure reducing valve body 320 is of piston type, and the adjustment accuracy is higher. Of course, in other embodiments of the present application, the pressure reducing valve body 320 may also be of diaphragm type.

More specifically, in this embodiment, the pressure reducing valve body 320 can be obtained by modifying the pressure reducing valve, thereby reducing the design workload.

Specifically, in this embodiment, as shown in Figure 3, a control cable 371 is also provided in the housing 310. The housing 310 is provided with an aviation connector 372. One end of the control cable 371 is connected to the aviation connector 372, and the other end is connected to the actuator. 350 connections. Of course, in other embodiments of the present application, the connector of the control cable 371 provided on the housing 310 is not limited to the aviation connector 372, as long as the control cable 371 can be connected.

Specifically, in this embodiment, the housing 310 includes a base 311 and an upper shell 312. The pressure reducing valve body 320 is fixedly mounted on the base 311, and the upper shell 312 covers the base 311. The base 311 and the upper shell 312 encapsulate the pressure reducing valve body 320, the actuator 350, etc., and form protection for the pressure reducing valve body 320, the actuator 350, etc., which is conducive to ensuring action accuracy, thereby ensuring oxygen addition adjustment accuracy.

Specifically, in this embodiment, as shown in Figure 3, the housing 310 is also provided with an air inlet joint 381 and an air outlet joint 382. In addition, the pressure reducing valve body 320 is provided with a backup air inlet and a backup air outlet. The backup air inlet The mouth is blocked with a backup air inlet plug 391, and the backup air outlet is plugged with a backup air outlet plug 392.

To sum up, the gas flow adjustment system provided by this embodiment improves the accuracy of oxygen flow adjustment in the following manner: according to Bernoulli's law, the gas supply pressure is adjusted, or in other words, the pressure difference between the front and rear of the throttling member 500 is controlled. The oxygen flow rate has fewer adjustment variables; using a servo motor as the drive motor of the actuator 350 improves the oxygen control accuracy; using the valve body of the piston gas pressure reducing valve as the pressure reducing valve body 320 of the pressure regulating valve 300 improves the oxygen adding flow rate. The stability of oxygenation pressure control; using a high-pressure micro-regulating valve as the throttling member 500 to adjust the throttling path, different throttling paths or throttling areas can be adjusted according to different application environments; stabilizing the rear-end pressure of the micro-regulating valve through the pressure stabilizing valve 800 , reducing the oxygen adjustment variables.

This embodiment also provides an oxygen-adding regulating cabinet, which includes the above-mentioned gas flow regulating system. The air inlet end of the regulating cabinet is connected to the oxygen source, and the air outlet end is connected to the oxygen adding point.

Finally, it should be noted that in this article, relational terms such as “first” and “second” are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or sequence between these entities or operations. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (12)

1. The utility model provides a gas flow regulating system, its characterized in that includes the gas-supply passageway and set gradually in along the gas delivery direction air-vent valve (300), air feed manometer (400), throttling element (500), steady voltage manometer (600) and steady voltage valve (800) of gas-supply passageway, air-vent valve (300) are used for adjusting gas pressure and export the gas that has steady pressure, steady voltage valve (800) are used for with gas pressure between throttling element (500) with steady voltage valve (800) stabilizes in the settlement numerical value.

2. The gas flow regulating system according to claim 1, further comprising a controller, wherein the pressure regulating valve (300), the gas supply pressure gauge (400), and the pressure stabilizing pressure gauge (600) are all connected to the controller, and the controller is configured to dynamically regulate the gas supply pressure of the pressure regulating valve (300) according to a unit load or a feed water flow rate and a dissolved oxygen value.

3. The gas flow regulating system according to claim 2, wherein a switch valve (100) and a gas source pressure gauge (200) are further provided between the gas inlet of the gas delivery passage and the pressure regulating valve (300), and the gas source pressure gauge (200) is connected to the controller.

4. A gas flow regulating system according to claim 2, wherein the gas delivery passage is further provided with a flow meter (700), the flow meter (700) being located between the throttling element (500) and the pressure stabilizing valve (800) for indicating the flow of gas downstream of the throttling element (500).

5. A gas flow regulating system according to any of claims 1-4, characterized in that the restriction (500) is a micro regulating valve or a capillary tube.

6. The gas flow regulating system according to any one of claims 1 to 4, wherein the pressure regulating valve (300) includes a housing (310), and a pressure reducing valve body (320), a pressure reducing valve cap (330), an actuator (350) and an adjusting lever (360) provided in the housing (310), the pressure reducing valve cap (330) being fixedly provided to the pressure reducing valve body (320), the actuator (350) adjusting the gas supply pressure of the pressure reducing valve body (320) by driving the adjusting lever (360).

7. The gas flow regulating system of claim 6, further comprising a mounting bracket (340), wherein the mounting bracket (340) is fixedly disposed to the relief bonnet (330), and wherein the actuator (350) is fixedly mounted to the mounting bracket (340).

8. The gas flow regulation system of claim 6, wherein the actuator (350) is an electric actuator or a pneumatic actuator.

9. The gas flow regulating system of claim 6, wherein the pressure relief valve body (320) is piston or diaphragm type.

10. The gas flow regulating system according to claim 6, wherein a control cable (371) is further provided in the housing (310), the housing (310) is provided with an air joint (372), one end of the control cable (371) is connected to the air joint (372), and the other end is connected to the actuator (350).

11. The gas flow regulating system according to claim 6, wherein the housing (310) includes a base (311) and an upper case (312), the pressure reducing valve body (320) is fixedly disposed on the base (311), and the upper case (312) is covered on the base (311).

12. An oxygenation regulating cabinet, characterized by comprising the gas flow regulating system according to any one of claims 1-9, wherein the gas inlet end of the regulating cabinet is connected with an oxygen source, and the gas outlet end is connected with an oxygenation point.